--- src/sys/dev/ixgbe/ixgbe.c.orig	2012-05-28 15:46:35.000000000 +0000
+++ src/sys/dev/ixgbe/ixgbe.c	2012-05-28 15:46:57.000000000 +0000
@@ -1152,7 +1152,7 @@
 		 * from the Intel linux driver 3.8.21.
 		 * Prefetching enables tx line rate even with 1 queue.
 		 */
-		txdctl |= (16 << 0) | (1 << 8);
+		txdctl |= (32 << 0) | (1 << 8);
 		IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(i), txdctl);
 	}